/Engine/Source/Runtime/MovieScene/Public/MovieSceneKeyStructHelper.h
Construction from a channel handle, a pointer to an external user-facing value on the key struct, and an array of handles
template<typename ChannelType, typename ValueType> FMovieSceneChannelValueHelper ( const [TMovieSceneChannelHandle](API\Runtime\MovieScene\Channels\TMovieSceneChannelHandle)< ChannelType > & InChannel, ValueType * InUserValue, [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FKeyHandle](API\Runtime\Engine\Curves\FKeyHandle) > AllKeyHandles )